Endothall
Collegeville Trappe Joint Public Works Department
Endothall is a herbicide used to kill aquatic plants and algae. It's also used on potato and cotton crops.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 20 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 20 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 94 ppb
The EWG Health Guideline of 94 ppb for endothall was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the stomach and intestines.
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for endothall, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1960s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2020-05-04 | 22213260.00 | ND |
| 2020-05-04 | 22213230.00 | ND |
| 2020-05-04 | 22213290.00 | ND |
| 2020-05-18 | 22213527.00 | ND |
| 2020-05-18 | 22213496.00 | ND |
| 2020-05-18 | 22213557.00 | ND |
| 2020-05-18 | 22213466.00 | ND |
| 2020-06-08 | 22414082.00 | ND |
| 2020-06-08 | 22414142.00 | ND |
| 2020-06-08 | 22414112.00 | ND |
| 2020-08-03 | 22797486.00 | ND |
| 2020-08-03 | 22797262.00 | ND |
| 2020-08-03 | 22797351.00 | ND |
| 2020-08-03 | 22797291.00 | ND |
| 2020-08-03 | 22797321.00 | ND |
| 2020-08-17 | 22797779.00 | ND |
| 2020-09-14 | 22997928.00 | ND |
| 2020-09-14 | 22997927.00 | ND |
| 2020-09-14 | 22997925.00 | ND |
| 2020-09-14 | 22997926.00 | ND |
| 2023-04-17 | 28700785.00 | ND |
| 2023-04-17 | 28700787.00 | ND |
| 2023-04-17 | 28700788.00 | ND |
| 2023-04-17 | 28700786.00 | ND |
| 2023-04-17 | 28700784.00 | ND |
| 2023-04-17 | 28700783.00 | ND |
| 2023-05-01 | 28898908.00 | ND |
| 2023-05-01 | 28898907.00 | ND |
| 2023-05-01 | 28898906.00 | ND |
| 2023-05-01 | 28898909.00 | ND |
| 2023-07-24 | 29495695.00 | ND |
| 2023-07-24 | 29495697.00 | ND |
| 2023-07-24 | 29495696.00 | ND |
| 2023-07-24 | 29495694.00 | ND |
| 2023-07-24 | 29495698.00 | ND |
| 2023-07-24 | 29495693.00 | ND |
| 2023-08-07 | 29495701.00 | ND |
| 2023-08-07 | 29495699.00 | ND |
| 2023-08-07 | 29495702.00 | ND |
| 2023-08-07 | 29495700.00 | ND |